|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Active Forest Fire Occurrences in Severe Lightning Years in Alaska
| Title: | Active Forest Fire Occurrences in Severe Lightning Years in Alaska |
| Authors: | Farukh, Murad Ahmed Browse this author | | Hayasaka, Hiroshi Browse this author →KAKEN DB |
| Keywords: | active fire | | hotspot | | lightning | | drought | | precipitation |
| Issue Date: | 2012 |
| Publisher: | Japan Society for Natural Disaster Science |
| Journal Title: | Journal of Natural Disaster Science |
| Volume: | 33 |
| Issue: | 2 |
| Start Page: | 71 |
| End Page: | 84 |
| Publisher DOI: | 10.2328/jnds.33.71 |
| Abstract: | Severe lightning flashes, 120,000 a year or four times more than in the average year, started around 300 fires in each of the three years of 2004, 2005, and 2007 but the burnt area of each year differed considerably. The burnt areas in 2004 and 2005 were the largest and the third largest in the last 55 years (1956-2010), respectively; the burnt area in 2007 was smaller than the average 3,541 km2. Overall, a comprehensive understanding of active forest fires in severe lightning years in Alaska was achieved based on various fire characteristics including the newly introduced “number of live fires” and “daily fire activity by hotspots” from NASA. These fire characteristics established the fact that severe lightning ignited Alaska's forests in June and July, and that most of the large fires in 2004 and 2005 started and lasted until August. Large numbers of live fires became active during drought and high-air-temperature conditions, which increased the burnt area in 2004. In 2005, continuous precipitation started from June but a large burnt area was also created by a very active forest fire period in August. The burnt area in 2007 was not so large due to continuous precipitation from the beginning of June. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/57919 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 早坂 洋史
|
